If, in the late 1930's, you knew that WW2 was going to happen, and that there were overt supporters of Hitler throughout your country, what would you do?

@jurban None of the above. Comply, maliciously, silently resisting. A filed drill bit here. A gas tank punctured there.

@Deweyoxberg
"Threaten them directly" is more broad than merely making statements.
And, a threat doesn't always have to be overt.